• To review the list of occupational diseases with a view to expanding it and consider recording the list in a Schedule to offer more flexibility for future changes. Pneumoconiosis — for example silicosis (see page 81); decompression illness and pulmonary barotrauma (a potentially life-threatening type of lung injury that can occur when a person experiences a sudden change in air pressure); and hypersensitivity pneumonitis (an immune system disorder in which the lungs become inflamed as an allergic reaction to inhaled microorganisms, plant and animal proteins or chemicals) have been identified for possible inclusion;